The Constitution provided no guidance on secession or readmission of states.
they brought republican ideas to southern politics
The people in steerage were at the bottom of the ship and below water level. There were no windows, no rooms, and very little of anything else. The ships in the 1900's divided decks according to classes of people. The decks were separated with locked gates and the upper deck people who paid the most for passage never met or saw the people on the other decks. The immigrants below were locked in so they couldn't have access to the upper decks. They were considered the poorest dirtiest people on the ship so we're sold the worse accommodations.
Thomas Nast worked to expose the illegal activities of William "Boss" Tweed.
Suspension bridges are one of the oldest engineering forms, dating back to the 4th century. Modern suspension bridges were made possible by the web truss, invented by John Augustus Roebling. The web truss made a very sturdy, rigid structure that could withstand storms, wind forces, and heavy loads.
homestead strike
People believed that the Chinese had taken their jobs